The Vampiric Kaiju Moth (Yes it's Mothra for 5e)
The vampiric Kaiju moth is a massive insectoid apex predator, a true terror. It feeds on other titans, as well as using them as hosts for its young. Among its prey is the tarrasque, which is native to the same world as the other kaiju. The tarrasque developed a number of its defenses specifically to survive the predation of the kaiju moth, such as its reflective carapace and the spines that ward off grapples from above. The kaiju moth does have a friendly, almost symbiotic relationship with the ketosimius. Groups of Aculeaus Rex also roam this world, and hunt other kaiju with might, weapons, and teamwork.
sheet here https://www.patreon.com/posts/97589193
Aculeatus Rex https://www.ofgodsandgamemasters.com/dnd5e/opendnd-content-2-aculeatus-rex
Ketosimius https://www.ofgodsandgamemasters.com/dnd5e/ketosimius-5e-compatible-monster
My mythic Tarrasque https://www.ofgodsandgamemasters.com/dnd5e/dnd-special-monster-the-tarrasque-but-mythic